Increasing attention is being paid to social determinants of health. We study how social support among pregnant women in peer groups relates to their well-being in a large online community. We find that while having more peer groups reduces observable social support in terms of information...

We explore the linkages between social media marketing activeness and reputational assets on digital platforms with a unique sample of over 8,000 C2C sellers on both Taobao, China’s largest C2C online shopping platform, and Sina Weibo, China’s largest microblogging platform. A unique...

Increasing attention is being paid to social determinants of health. We study how quasi-randomly assigned peer groups affect social support among over 24,000 pregnant women, and how social support in these peer groups relates to mothers' well-being both during and after pregnancy as well as...

The short squeeze of Gamestop (GME) has revealed to the world how retail investors, pooling through social media, can severely impact financial markets. In this paper, we devise an early warning signal to detect suspicious users’ social network activity, which might affect the financial market...

The short squeeze of Gamestop (GME) has revealed to the world how retail investors pooling through social media can severely impact financial markets. In this paper, we devise an early warning signal to detect suspicious users' social network activity, which might affect the financial market...